CN105545051A - High-sensitivity flashing light type underground parking reversing auxiliary system - Google Patents
High-sensitivity flashing light type underground parking reversing auxiliary system Download PDFInfo
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- CN105545051A CN105545051A CN201510922874.7A CN201510922874A CN105545051A CN 105545051 A CN105545051 A CN 105545051A CN 201510922874 A CN201510922874 A CN 201510922874A CN 105545051 A CN105545051 A CN 105545051A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H6/00—Buildings for parking cars, rolling-stock, aircraft, vessels or like vehicles, e.g. garages
- E04H6/42—Devices or arrangements peculiar to garages, not covered elsewhere, e.g. securing devices, safety devices, monitoring and operating schemes; centering devices
- E04H6/426—Parking guides
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- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The invention discloses a high-sensitivity flashing light type underground parking reversing auxiliary system. The high-sensitivity flashing light type underground parking reversing auxiliary system includes a controller, a flashing reminding device connected to the controller, a power supply connected to the flashing reminding device and the controller, and an ultrasonic sensing device which is connected to the controller through a timer; the flashing reminding device is a flashing light control circuit which is provided with a flashing tube; and an ultrasonic receiving end of the ultrasonic sensing device is provided with a high-sensitivity ultrasonic receiving circuit. The high-sensitivity flashing light type underground parking reversing auxiliary system can allow a vehicle to better reverse in an underground parking, the occurrence rate of an accident due to an unfamiliar field or a bad driving skill can be greatly decreased, and the personal and property safety of a driver can be better ensured.
Description
Technical field
The invention belongs to parking field of auxiliary, specifically refer to a kind of high sensitivity flash-lamp type underground parking reversing aid system that can effectively help driver to stop in parking lot.
Background technology
Along with the development of society, automobile progressively universal, along with the increase of the automobile volume of holding per capita, need larger ground with the underground space for parking cars when the building of building, and driver is easy to when moveing backward the collision or the scuffing that cause vehicle because of unfamiliar condition.And in prior art, driver normally relies on the driving technology of self or the auxiliary reversing device of vehicle self-carrying to complete reversing, and it is limited and the driver of auxiliary reversing device is not installed for some driving technology, in unfamiliar environment, reversing is easy to have an accident, and all can bring larger trouble to each driver and administrative staff.
Summary of the invention
The object of the invention is to overcome the problems referred to above, a kind of high sensitivity flash-lamp type underground parking reversing aid system is provided, vehicle can better be moveed backward in underground parking, greatly reducing the incidence crossing the accident that difference is brought because being unfamiliar with place or driving technology, better having ensured the person and the property safety of driver.
Object of the present invention is achieved through the following technical solutions:
High sensitivity flash-lamp type underground parking reversing aid system, comprise controller, connect sparkling prompting device on the controller, the power supply be simultaneously connected with controller with sparkling prompting device, and formed by the supersonic sensing device that timer is connected with this controller; Described sparkling prompting device is the flashing light control circuit being provided with flash tube, and the ultrasonic wave receiving terminal place of supersonic sensing device is provided with high-sensitivity ultrasonic receiving circuit.
Further, above-mentioned flashing light control circuit is by transformer T1, all be arranged on inductance coil L1 and the inductance coil L2 on the former limit of transformer T1, be arranged on the inductance coil L3 of the secondary of transformer T1, transformer T2, unidirectional thyristor VS1, flash tube EL1, triode VT1, relay K, N pole is connected with the Same Name of Ends of the former limit inductance coil L1 of transformer T1, P pole meets the diode D1 of positive source, one end is connected with the N pole of diode D1, the resistance R1 that the other end is connected with the base stage of triode VT1, one end is connected with the base stage of triode VT1, the resistance R2 that the other end is connected with the non-same polarity of former limit inductance coil L2 of transformer T1 and the Same Name of Ends of the secondary inductance coil L3 of transformer T1 simultaneously, negative pole connects power cathode, the electric capacity C1 that positive pole is connected with the Same Name of Ends of the secondary inductance coil L3 of transformer T1, P pole is connected with the non-same polarity of the secondary inductance coil L3 of transformer T1, the diode D2 that N pole is connected with the anode of unidirectional thyristor VS1 after light resistor RT1, positive pole is connected with the N pole of diode D2, the electric capacity C2 that negative pole is connected with the negative pole of electric capacity C1, positive pole is connected with the anode of unidirectional thyristor VS1, the electric capacity C3 that negative pole is connected with the control pole of unidirectional thyristor VS1 after resistance R4, one end is connected with the negative pole of electric capacity C3, the resistance R3 that the other end is connected with the negative electrode of unidirectional thyristor VS1, positive pole is connected with the positive pole of electric capacity C3, the electric capacity C4 that negative pole is connected with the Same Name of Ends of the primary coil of transformer T2, be disposed adjacent with light resistor RT1 and light emitting diode VD1 for irradiating bright resistance RT1, and one end is connected with the N pole of diode D2 after the constant close contact K-2 of relay K, the warning light EL2 that the other end is connected with the negative electrode of unidirectional thyristor VS1 forms, wherein, the colelctor electrode of triode VT1 is connected with the non-same polarity of the former limit inductance coil L1 of transformer T1, the emitter stage of triode VT1 is connected with the negative pole of electric capacity C1, the Same Name of Ends ground connection of the former limit inductance coil L2 of transformer T1, the negative electrode of unidirectional thyristor VS1 is connected with the Same Name of Ends of the non-same polarity of transformer T2 former limit inductance coil and the secondary inductance coil of transformer T2 simultaneously, one end of relay K is connected with the N pole of light emitting diode VD1, the other end of this relay K forms the signal input part of this circuit with the P pole of diode VD1 and is connected with controller, one end of flash tube EL1 is connected with the N pole of diode D2 after the constant open contact K-1 of relay K, its other end is connected with the negative electrode of unidirectional thyristor VS1, the trigger end of this flash tube EL1 is connected with the non-same polarity of transformer T2 secondary inductance coil, the P pole of diode D1 forms the input of this circuit with the negative pole of electric capacity C1 and is connected with power supply, power supply provides the input voltage of 12V to this circuit.
Further, above-mentioned high-sensitivity ultrasonic receiving circuit is by receiver BL, metal-oxide-semiconductor Q1, triode VT2, triode VT3, operational amplifier P1, positive pole is connected with one end of receiver BL, the electric capacity C5 that negative pole is connected with the grid of metal-oxide-semiconductor Q1 after resistance R4, P pole is connected with the grid of metal-oxide-semiconductor Q1, the diode D3 that N pole is connected with the other end of receiver BL, P pole is connected with the N pole of diode D3, the diode D4 that N pole is connected with the P pole of diode D3, the resistance R5 be arranged in parallel with diode D4, one end is connected with the source electrode of metal-oxide-semiconductor Q1, the resistance R6 that the other end is connected with the P pole of diode D4, positive pole is connected with the source electrode of metal-oxide-semiconductor Q1, the electric capacity C6 that negative pole is connected with the colelctor electrode of triode VT2 and the base stage of triode VT3 simultaneously, one end is connected with the drain electrode of metal-oxide-semiconductor Q1, the resistance R7 that the other end is connected with the negative pole of electric capacity C6 after resistance R8, one end is connected with the tie point of resistance R8 with resistance R7, the resistance R9 that the other end is connected with the colelctor electrode of triode VT3, positive pole is connected with the emitter stage of triode VT3, the electric capacity C8 that negative pole is connected with the base stage of triode VT2, one end is connected with the positive pole of electric capacity C8, the resistance R40 that the other end is connected with the emitter stage of triode VT2, positive pole is connected with the colelctor electrode of triode VT3, the electric capacity C7 that negative pole is connected with the positive input terminal of operational amplifier P1, one end is connected with the negative pole of electric capacity C7, the resistance R41 that the other end is connected with the positive pole of electric capacity C8, negative pole is connected with the positive pole of electric capacity C8, the electric capacity C50 that positive pole is connected with the negative input end of operational amplifier P1 after resistance R42, be serially connected in the resistance R43 between the negative input end of operational amplifier P1 and output, positive pole is connected with the negative pole of electric capacity C7, the electric capacity C9 that negative pole is connected with the output of operational amplifier P1, and the electric capacity C51 that positive pole is connected with the output of operational amplifier P1 forms, wherein, the N pole of diode D3 is connected with the base stage of triode VT2, the base earth of triode VT2, and the tie point of resistance R7 and resistance R8 is connected to+5V power supply, the negative pole of electric capacity C51 as this circuit output and be connected with the input of timer.
As preferably, described triode VT1, triode VT2 and triode VT3 are NPN type triode, and unidirectional thyristor VS1 is high speed thyristor, and the model of operational amplifier P1 is LM324.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the present invention can judge according to the distance of supersonic sensing device to vehicle and rear view of vehicle, then controller controls sparkling prompting device to complete the prompting to driver by the data that supersonic sensing device sends, substantially increase driver to rear space control, improve efficiency and safety that driver parks cars.
(2) the present invention is provided with flashing light control circuit, can adjust according to the flicker frequency of supersonic sensing device feedack to light, make driver can carry out handle to the spacing of rear view of vehicle and obstruction more intuitively to control, substantially increase the safety of storing cycle process.
(3) the present invention is provided with high-sensitivity ultrasonic receiving circuit, greatly improve the sensitivity that ultrasonic wave receives, improve the safety in utilization of whole equipment, the prompting that can be good at avoiding receive delay to cause postpones, and has guided driver to park cars more accurately.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention.
Fig. 2 is the circuit diagram of flashing light control circuit of the present invention.
Fig. 3 is the circuit diagram of high-sensitivity ultrasonic receiving circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, high sensitivity flash-lamp type underground parking reversing aid system, comprises controller, connects sparkling prompting device on the controller, the power supply be simultaneously connected with controller with sparkling prompting device, and formed by the supersonic sensing device that timer is connected with this controller; Described sparkling prompting device is the flashing light control circuit being provided with flash tube, and the ultrasonic wave receiving terminal place of supersonic sensing device is provided with high-sensitivity ultrasonic receiving circuit.
Vehicle is when moveing backward, timer is responsible for record supersonic sensing device and is sent and receive hyperacoustic time difference, and send signal according to the time difference to controller, controller will send the voltage signal of varying strength after receiving the signal that timer sends to the signal input part of flashing light control circuit according to the intensity of signal, and flashing light control circuit is according to the flashing rate of the signal strength signal intensity adjustment sparkling prompting device of controller, thus can be good at the range difference reminding driver vehicle and rear barrier, substantially increase the parking safety of driver.Its middle controller can select Industrial Personal Computer (IPC), PLC, PC computer, panel computer etc.; Flash tube selects bolarious flash tube, to avoid the sight line of the flash tube luminescence rolling flower driver of high brightness; Also be provided with the attention gatter of other colors in sparkling prompting device, when not having vehicle parking, this attention gatter is long bright, and driver can be allowed to find room faster.
As shown in Figure 2, flashing light control circuit, by transformer T1, is all arranged on inductance coil L1 and the inductance coil L2 on the former limit of transformer T1, is arranged on the inductance coil L3 of the secondary of transformer T1, transformer T2, unidirectional thyristor VS1, flash tube EL1, triode VT1, relay K, diode D1, diode D2, light emitting diode VD1, resistance R1, resistance R2, resistance R3, resistance R4, warning light EL2, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4 form.
During connection, the N pole of diode D1 is connected with the Same Name of Ends of the former limit inductance coil L1 of transformer T1, P pole connects positive source, one end of resistance R1 is connected with the N pole of diode D1, the other end is connected with the base stage of triode VT1, one end of resistance R2 is connected with the base stage of triode VT1, the other end is connected with the non-same polarity of former limit inductance coil L2 of transformer T1 and the Same Name of Ends of the secondary inductance coil L3 of transformer T1 simultaneously, the negative pole of electric capacity C1 connects power cathode, positive pole is connected with the Same Name of Ends of the secondary inductance coil L3 of transformer T1, the P pole of diode D2 is connected with the non-same polarity of the secondary inductance coil L3 of transformer T1, N pole is connected with the anode of unidirectional thyristor VS1 after light resistor RT1, the positive pole of electric capacity C2 is connected with the N pole of diode D2, negative pole is connected with the negative pole of electric capacity C1, the positive pole of electric capacity C3 is connected with the anode of unidirectional thyristor VS1, negative pole is connected with the control pole of unidirectional thyristor VS1 after resistance R4, one end of resistance R3 is connected with the negative pole of electric capacity C3, the other end is connected with the negative electrode of unidirectional thyristor VS1, the positive pole of electric capacity C4 is connected with the positive pole of electric capacity C3, negative pole is connected with the Same Name of Ends of the primary coil of transformer T2, light emitting diode VD1 is disposed adjacent with light resistor RT1 and for irradiating bright resistance RT1, one end of warning light EL2 is connected with the N pole of diode D2 after the constant close contact K-2 of relay K, the other end is connected with the negative electrode of unidirectional thyristor VS1, wherein, the colelctor electrode of triode VT1 is connected with the non-same polarity of the former limit inductance coil L1 of transformer T1, the emitter stage of triode VT1 is connected with the negative pole of electric capacity C1, the Same Name of Ends ground connection of the former limit inductance coil L2 of transformer T1, the negative electrode of unidirectional thyristor VS1 is connected with the Same Name of Ends of the non-same polarity of transformer T2 former limit inductance coil and the secondary inductance coil of transformer T2 simultaneously, one end of relay K is connected with the N pole of light emitting diode VD1, the other end of this relay K forms the signal input part of this circuit with the P pole of diode VD1 and is connected with controller, one end of flash tube EL1 is connected with the N pole of diode D2 after the constant open contact K-1 of relay K, its other end is connected with the negative electrode of unidirectional thyristor VS1, the trigger end of this flash tube EL1 is connected with the non-same polarity of transformer T2 secondary inductance coil, the P pole of diode D1 forms the input of this circuit with the negative pole of electric capacity C1 and is connected with power supply, power supply provides the input voltage of 12V to this circuit.
Before the voltage signal receiving controller, warning light EL2 conducting is long bright, do not park cars to point out driver herein, and when vehicle backing Time Controller sends voltage signal, relay K obtains and electricly makes that its constant open contact K-1 is closed, constant close contact K-2 disconnects, reaches the object of conducting flash tube EL1 disconnection warning light EL2.Triode VT1, transformer T1 and electric capacity C1 form inductance of three-point oscillating circuit, boost and are charged to electric capacity C1 by DC voltage after rectification, and make it as the working power of flash tube EL1 through transformer T1 and diode D2; Voltage through diode D2 charges to electric capacity C4 through light resistor RT1 again, when the voltage on electric capacity C1 reach flash tube EL1 trigger end set out voltage time unidirectional thyristor VS1 conducting, electric capacity C1 discharges through transformer T1, the secondary inductance coil of transformer T2 is just induced high pressure, thus the flash tube EL1 Discharge illuminating that sets out; When electric capacity C2 discharge off, unidirectional thyristor VS1 loses conducting voltage thus turns off, and flash tube EL1 stops luminescence, so just completes the luminescence process of a flash tube.Repetition above-mentioned steps like this just completes the process of whole flash of light, and the flicker frequency of flash tube EL1 determines primarily of the resistance of light resistor RT1, and the resistance of light resistor RT1 is controlled by the luminous intensity of light emitting diode VD1, and then make controller can well complete the control of flash tube EL1 glow frequency, the flicker of flash tube EL1 high-frequency is controlled at the nearlyer Time Controller of vehicle distances obstruction, better can attract the notice of reminding driver, suitable distance should be stopped to make it better know.
As shown in Figure 3, high-sensitivity ultrasonic receiving circuit by receiver BL, metal-oxide-semiconductor Q1, triode VT2, triode VT3, operational amplifier P1, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R40, resistance R41, resistance R42, resistance R43, diode D3, diode D4, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C50, and electric capacity C51 forms.
During connection, the positive pole of electric capacity C5 is connected with one end of receiver BL, negative pole is connected with the grid of metal-oxide-semiconductor Q1 after resistance R4, the P pole of diode D3 is connected with the grid of metal-oxide-semiconductor Q1, N pole is connected with the other end of receiver BL, the P pole of diode D4 is connected with the N pole of diode D3, N pole is connected with the P pole of diode D3, resistance R5 and diode D4 is arranged in parallel, one end of resistance R6 is connected with the source electrode of metal-oxide-semiconductor Q1, the other end is connected with the P pole of diode D4, the positive pole of electric capacity C6 is connected with the source electrode of metal-oxide-semiconductor Q1, negative pole is connected with the colelctor electrode of triode VT2 and the base stage of triode VT3 simultaneously, one end of resistance R7 is connected with the drain electrode of metal-oxide-semiconductor Q1, the other end is connected with the negative pole of electric capacity C6 after resistance R8, one end of resistance R9 is connected with the tie point of resistance R8 with resistance R7, the other end is connected with the colelctor electrode of triode VT3, the positive pole of electric capacity C8 is connected with the emitter stage of triode VT3, negative pole is connected with the base stage of triode VT2, one end of resistance R40 is connected with the positive pole of electric capacity C8, the other end is connected with the emitter stage of triode VT2, the positive pole of electric capacity C7 is connected with the colelctor electrode of triode VT3, negative pole is connected with the positive input terminal of operational amplifier P1, one end of resistance R41 is connected with the negative pole of electric capacity C7, the other end is connected with the positive pole of electric capacity C8, the negative pole of electric capacity C50 is connected with the positive pole of electric capacity C8, positive pole is connected with the negative input end of operational amplifier P1 after resistance R42, between the negative input end that resistance R43 is serially connected in operational amplifier P1 and output, the positive pole of electric capacity C9 is connected with the negative pole of electric capacity C7, negative pole is connected with the output of operational amplifier P1, the positive pole of electric capacity C51 is connected with the output of operational amplifier P1, wherein, the N pole of diode D3 is connected with the base stage of triode VT2, the base earth of triode VT2, and the tie point of resistance R7 and resistance R8 is connected to+5V power supply, the negative pole of electric capacity C51 as this circuit output and be connected with the input of timer.
During use, electric capacity C5, resistance R4, diode D3 and diode D4 form input protection circuit, can be good at the impact that protection circuit exempts from input signal, extend the application life of whole circuit; Metal-oxide-semiconductor Q1 and resistance R5, resistance R6 and resistance R7 are combined into current amplifier, the electric current of input can be amplified; And triode VT2 and triode VT3 forms two-stage voltage amplifier, the voltage of input is amplified; Input voltage after being exaggerated and input current export after the operational amplification circuit that operational amplifier P1 forms, wherein resistance R42 is for controlling the receiving sensitivity of whole circuit, the resistance of different resistance can be used according to different demands, if desired often change its sensitivity and slide rheostat can also be used to replace resistance R42.Under normal conditions, the level exported through the negative pole of electric capacity C51 is high level, and when receiving ultrasonic signal, electric capacity C51 then output low level, export low level by counter obtain rear according to output signal time calculate to obtain the time difference, so just can well complete whole hyperacoustic detection process.
Described triode VT1, triode VT2 and triode VT3 are NPN type triode, and unidirectional thyristor VS1 is high speed thyristor, and the model of operational amplifier P1 is LM324.
As mentioned above, just well the present invention can be realized.
Claims (4)
1. high sensitivity flash-lamp type underground parking reversing aid system, it is characterized in that: comprise controller, connect sparkling prompting device on the controller, the power supply be simultaneously connected with controller with sparkling prompting device, and formed by the supersonic sensing device that timer is connected with this controller; Described sparkling prompting device is the flashing light control circuit being provided with flash tube, and the ultrasonic wave receiving terminal place of supersonic sensing device is provided with high-sensitivity ultrasonic receiving circuit.
2. high sensitivity flash-lamp type underground parking according to claim 1 reversing aid system, it is characterized in that: described flashing light control circuit is by transformer T1, all be arranged on inductance coil L1 and the inductance coil L2 on the former limit of transformer T1, be arranged on the inductance coil L3 of the secondary of transformer T1, transformer T2, unidirectional thyristor VS1, flash tube EL1, triode VT1, relay K, N pole is connected with the Same Name of Ends of the former limit inductance coil L1 of transformer T1, P pole meets the diode D1 of positive source, one end is connected with the N pole of diode D1, the resistance R1 that the other end is connected with the base stage of triode VT1, one end is connected with the base stage of triode VT1, the resistance R2 that the other end is connected with the non-same polarity of former limit inductance coil L2 of transformer T1 and the Same Name of Ends of the secondary inductance coil L3 of transformer T1 simultaneously, negative pole connects power cathode, the electric capacity C1 that positive pole is connected with the Same Name of Ends of the secondary inductance coil L3 of transformer T1, P pole is connected with the non-same polarity of the secondary inductance coil L3 of transformer T1, the diode D2 that N pole is connected with the anode of unidirectional thyristor VS1 after light resistor RT1, positive pole is connected with the N pole of diode D2, the electric capacity C2 that negative pole is connected with the negative pole of electric capacity C1, positive pole is connected with the anode of unidirectional thyristor VS1, the electric capacity C3 that negative pole is connected with the control pole of unidirectional thyristor VS1 after resistance R4, one end is connected with the negative pole of electric capacity C3, the resistance R3 that the other end is connected with the negative electrode of unidirectional thyristor VS1, positive pole is connected with the positive pole of electric capacity C3, the electric capacity C4 that negative pole is connected with the Same Name of Ends of the primary coil of transformer T2, be disposed adjacent with light resistor RT1 and light emitting diode VD1 for irradiating bright resistance RT1, and one end is connected with the N pole of diode D2 after the constant close contact K-2 of relay K, the warning light EL2 that the other end is connected with the negative electrode of unidirectional thyristor VS1 forms, wherein, the colelctor electrode of triode VT1 is connected with the non-same polarity of the former limit inductance coil L1 of transformer T1, the emitter stage of triode VT1 is connected with the negative pole of electric capacity C1, the Same Name of Ends ground connection of the former limit inductance coil L2 of transformer T1, the negative electrode of unidirectional thyristor VS1 is connected with the Same Name of Ends of the non-same polarity of transformer T2 former limit inductance coil and the secondary inductance coil of transformer T2 simultaneously, one end of relay K is connected with the N pole of light emitting diode VD1, the other end of this relay K forms the signal input part of this circuit with the P pole of diode VD1 and is connected with controller, one end of flash tube EL1 is connected with the N pole of diode D2 after the constant open contact K-1 of relay K, its other end is connected with the negative electrode of unidirectional thyristor VS1, the trigger end of this flash tube EL1 is connected with the non-same polarity of transformer T2 secondary inductance coil, the P pole of diode D1 forms the input of this circuit with the negative pole of electric capacity C1 and is connected with power supply, power supply provides the input voltage of 12V to this circuit.
3. high sensitivity flash-lamp type underground parking according to claim 2 reversing aid system, it is characterized in that: described high-sensitivity ultrasonic receiving circuit is by receiver BL, metal-oxide-semiconductor Q1, triode VT2, triode VT3, operational amplifier P1, positive pole is connected with one end of receiver BL, the electric capacity C5 that negative pole is connected with the grid of metal-oxide-semiconductor Q1 after resistance R4, P pole is connected with the grid of metal-oxide-semiconductor Q1, the diode D3 that N pole is connected with the other end of receiver BL, P pole is connected with the N pole of diode D3, the diode D4 that N pole is connected with the P pole of diode D3, the resistance R5 be arranged in parallel with diode D4, one end is connected with the source electrode of metal-oxide-semiconductor Q1, the resistance R6 that the other end is connected with the P pole of diode D4, positive pole is connected with the source electrode of metal-oxide-semiconductor Q1, the electric capacity C6 that negative pole is connected with the colelctor electrode of triode VT2 and the base stage of triode VT3 simultaneously, one end is connected with the drain electrode of metal-oxide-semiconductor Q1, the resistance R7 that the other end is connected with the negative pole of electric capacity C6 after resistance R8, one end is connected with the tie point of resistance R8 with resistance R7, the resistance R9 that the other end is connected with the colelctor electrode of triode VT3, positive pole is connected with the emitter stage of triode VT3, the electric capacity C8 that negative pole is connected with the base stage of triode VT2, one end is connected with the positive pole of electric capacity C8, the resistance R40 that the other end is connected with the emitter stage of triode VT2, positive pole is connected with the colelctor electrode of triode VT3, the electric capacity C7 that negative pole is connected with the positive input terminal of operational amplifier P1, one end is connected with the negative pole of electric capacity C7, the resistance R41 that the other end is connected with the positive pole of electric capacity C8, negative pole is connected with the positive pole of electric capacity C8, the electric capacity C50 that positive pole is connected with the negative input end of operational amplifier P1 after resistance R42, be serially connected in the resistance R43 between the negative input end of operational amplifier P1 and output, positive pole is connected with the negative pole of electric capacity C7, the electric capacity C9 that negative pole is connected with the output of operational amplifier P1, and the electric capacity C51 that positive pole is connected with the output of operational amplifier P1 forms, wherein, the N pole of diode D3 is connected with the base stage of triode VT2, the base earth of triode VT2, and the tie point of resistance R7 and resistance R8 is connected to+5V power supply, the negative pole of electric capacity C51 as this circuit output and be connected with the input of timer.
4. high sensitivity flash-lamp type underground parking according to claim 3 reversing aid system, it is characterized in that: described triode VT1, triode VT2 and triode VT3 are NPN type triode, unidirectional thyristor VS1 is high speed thyristor, and the model of operational amplifier P1 is LM324.
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| CN103163525A (en) * | 2011-12-16 | 2013-06-19 | 江南大学 | Reversing radar based on single chip microcomputer control |
| CN203157842U (en) * | 2013-04-09 | 2013-08-28 | 中国国际海运集装箱(集团)股份有限公司 | Trailer with back-up alarming device |
| CN204009068U (en) * | 2014-08-29 | 2014-12-10 | 杭州阳光工具有限公司 | A kind of garage backup buzzer |
| CN104807584A (en) * | 2015-04-25 | 2015-07-29 | 成都诚邦动力测试仪器有限公司 | Highly sensitive torque sensor |
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